[tex-live] use of x86_64-darwin only in mactex 2010

[Adam R. Maxwell]

On Jun 21, 2010, at 7:11 AM, Ralph Martin wrote:

> Why are there separate universal and 64 bit binaries, anyway? Surely the "right" way to do this is to produce 3-way binaries with ppc, i386, and x86_64 all in the same file, not some 2 way binaries and a separate lot of 64 bit binaries. That's the whole point of this universal thing - to stop users having to worry about it.

The 64-bit binaries are compiled for Snow Leopard (10.6) only.  
If they were included in a 3-way universal binary, Leopard (10.5)
would try to use the x86_64 segment, even though it's not 
compatible with 10.5 because of the compiler/linker options used.

-- 
Adam